Base 17 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 181: | \[{17^{181}-1\over16}\] | 1087 × 53939 × 142851307959417084470710609408407449<36> × 2920902395704020651392472288257933855695106586056892291644538818873326000590289<79> × 13140173089540153390769049845563045150130241504699545998897805047945261657987004551943522467110049537<101> |